* CompleteMonster: [[MorallyAmbiguousDoctorate Dr. Tomohiko Katsuragi]] is the Saiki clan's doctor and one of Souma's lovers. He [[BitchInSheepsClothing initially appears]] to be a polite, helpful doctor, but is soon revealed to be a disgusting [[WouldHurtAChild pedophilic]] rapist and multiple murderer. When Souma informs him that his stepmother Sakurako was sexually abusing him, Katsuragi drugs Sakurako and forces the traumatized young Souma to slit her wrists and kill her, not to stop the boy's suffering but so [[{{Yandere}} he could have Souma for himself]]. He regularly rapes and tortures Souma for years, before doing the same to Masataka, Souma's lover, out of jealousy. He gives [[DomesticAbuser his wife Asayo the same treatment]], turning her into a battered BrokenBird. He later tries to poison Souma's ill father Lord Saki as well, one of the few people still remaining to him. Out of the many horrible people in this story, he's definitely the worst.
* DracoInLeatherPants: Yes, Souma has a heartbreaking and terrible past. Yes, he's no CompleteMonster. But he '''''did''''' mentally and sexually abuse the first person that gave him real affection in a long time, '''and no DarkAndTroubledPast justifies or handwaves that'''. Even Souma himself deeply regrets what he did to Masataka, fandom!
* HoYay: In addition to the obvious {{Yaoi}} relationships, there's a lot of hints that some side characters are attracted to Souma.
** Considering that it's '''[[ReallyGetsAround Souma]]''', odds are they've slept with him already.
* JerkassWoobie: Souma and Sakurako. Both have heartbreaking pasts and big reasons to be the way they are, but it's NOT a justification for the shit they pull on others.
* MagnificentBastard: Souma has traces of this, specially when [[spoiler: he brilliantly and spectacularly punishes Katsuragi.]]
* TheWoobie: Poor Masataka. And Asayo, Katsuragi's wife. And the young maid that [[spoiler: was Souma's mistress and got pregnant with his baby, then was tortured by Sakurako, lost her baby and ended up horribly broken.]]